package thread;

public class SyncDemo3 {
    public static void main(String[] args) {
        Boo b1 = new Boo();
        Boo b2 = new Boo();
        Thread t1 = new Thread(){
            public void run(){
                b1.doSome();
            }
        };
        Thread t2 = new Thread(){
            public void run(){
                b2.doSome();
            }
        };
        t1.start();
        t2.start();
    }
}
class Boo{
    public static void doSome(){
        synchronized (Boo.class){
        Thread t = Thread.currentThread();
        System.out.println(t+"doSome方法开始执行");
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(t+"doSome方法执行完毕");
        }
    }
}
